1) .45GAP shooters are probably laughing behind their hands at people who mocked the caliber for being uncommon. It's a lot more common than .45ACP at big box stores right now. I briefly considered buying a couple boxes to shoot through my 625, but changed my mind...
2) .22LR availability seems to be a little better. I bought the last carton of Remington Golden Bullets to replace what I shot up today, but they had a fair amount of bricks of Federal Spitfire, as well as mid-price CCI and Remchester in the 50- and 100-rd packages.
3) There was plenty of .40 S&W.
4) .38 S&W, and .32 S&W Long are plentiful, and suddenly don't look so expensive relative to regular autopistol ammunition.